/*
 *  Axolotl - Alternate persistence for Grails
 *  Copyright (C) 2008  Juanjo García Latre
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package com.googlecode.axolotl.query;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;


/**
 *
 *
 * @author     juanjo
 */
public abstract class Conjunction extends Criterion {

	private List<Criterion> criteria = new ArrayList<Criterion>();


	/**
	 * 
	 */
	public Object clone() {
		Conjunction conj = (Conjunction) super.clone();			
		conj.criteria = new ArrayList<Criterion>();
		for (Criterion criterion : criteria) {
			conj.add( (Criterion) criterion.clone() );
		}
		return conj;
	}
	

   /**
    *
    */
   public void add(Criterion crt) {
      if (crt == null)
         throw new IllegalArgumentException();
         
      criteria.add(crt);
   }


	/**
	 *
	 */
	public void addFirst(Criterion crt) {
		add(0, crt);
	}
	

	/**
	 *
	 */
	public void add(int position, Criterion crt) {
		if (crt == null)
			throw new IllegalArgumentException();

		criteria.add(position, crt);
	}


	/**
	 * 
	 */
	public void addAll(Conjunction filter) {
		criteria.addAll( filter.criteria );
	}


   /**
    * Removes a <code>Criterion</code> from this Conjunction.
    */
   public void remove(Criterion crt) {
      criteria.remove(crt);
   }


   /**
    * @return criteria included in this Conjunction as a List.
    */
   public List<Criterion> getCriteria() {
      return Collections.unmodifiableList(criteria);
   }

}
